CTA Study of Ruptured Aneurysms of the Posterior Communicating Artery

Figure 1

The mFS, a CT-based rating scale is as follows; (a) Grade 1 consists of thin, minimal, or diffuse SAH without IVH; (b) Grade 2 consists of minimal or thin SAH with IVH; (c) Grade 3 is defined by a thick cisternal clot without IVH; (d) Grade 4 is defined by a cisternal clot with IVH. Abbreviations: CT: computed tomography; IVH: intraventricular hemorrhage; mFS: modified Fisher scale; SAH: subarachnoid hemorrhage.

(a)

(b)

(c)

(d)